(Validating User Input) For any input, if the value entered is other than 1 or 2, keep taking input until the user enters a correct value.

Assignment is about to show that number is 1 and 2 or digit.
I used if else if statement here. and find great function.
Note : use this code. and try from different ways.

---

 <?PHP  
      $inputs = array();  
      if (isset($_POST['submit'])) { //to check if the form was submitted  
           $value = isset($_POST['input0'])? $_POST['input0'] : null;  
           for($count = 1; $value != null; $count++){  
                array_push($inputs, $value);  
                $value = isset($_POST['input'.$count])? $_POST['input'.$count] : null;  
           }  
      }  
      var_dump($inputs);  
 ?>       
 <form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">  
 <!-- to take multiple inputs copy the below line and change name="input" attribute -->  
 Enter input 1:&nbsp;<input type="text" name="input0" value="" /><br />  
 <input type="submit" name="submit" value="Submit" />  
 </form>  
 <?php  
           $max = $inputs[0];  
           if ($max == 2)  
                {  
                     echo "Correct Value";  
                     die();  
                }  
           elseif ($max == 1)  
                {  
                     echo " Correct Value";  
                     die();  
                }  
           elseif ($max =! 1)  
                {  
                     echo " Not Correct Value. <br /> Try Again";  
                }  
           elseif ($max =! 2)  
                {  
                     echo " Not Correct Value. <br /> Try Again";  
                }  
           else  
                {  
                     echo "Try Again : Enter Digits";  
                }  
 ?>